US4846048A - Hydraulic cylinder with piston and with a magnetic device for piston position determination - Google Patents
Hydraulic cylinder with piston and with a magnetic device for piston position determination Download PDFInfo
- Publication number
- US4846048A US4846048A US07/143,168 US14316887A US4846048A US 4846048 A US4846048 A US 4846048A US 14316887 A US14316887 A US 14316887A US 4846048 A US4846048 A US 4846048A
- Authority
- US
- United States
- Prior art keywords
- cylinder
- bore
- magnetic flux
- flux guiding
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
- F15B15/2861—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using magnetic means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S91/00—Motors: expansible chamber type
- Y10S91/04—Magnets
Abstract
Description
Claims (8)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK1958/86 | 1986-04-29 | ||
DK195886A DK195886A (en) | 1986-04-29 | 1986-04-29 | WORKING CYLINDER WITH STAMP AND WITH A MAGNETIC DEVICE FOR DETERMINING A STAMP POSITION |
Publications (1)
Publication Number | Publication Date |
---|---|
US4846048A true US4846048A (en) | 1989-07-11 |
Family
ID=8109149
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/143,168 Expired - Fee Related US4846048A (en) | 1986-04-29 | 1987-04-14 | Hydraulic cylinder with piston and with a magnetic device for piston position determination |
Country Status (6)
Country | Link |
---|---|
US (1) | US4846048A (en) |
EP (1) | EP0269662A1 (en) |
JP (1) | JPS63503159A (en) |
DK (1) | DK195886A (en) |
FI (1) | FI875735A0 (en) |
WO (1) | WO1987006656A1 (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5271121A (en) * | 1992-01-21 | 1993-12-21 | Maverick International, Inc. | Pneumatic windshield wiper with sensor controlled motor |
US5325762A (en) * | 1992-10-29 | 1994-07-05 | Nordson Corporation | Fluid pressure operated piston engine assembly |
US5477675A (en) * | 1989-02-17 | 1995-12-26 | Nartron Corporation | Fluid power assist method and apparatus |
GB2311612A (en) * | 1996-03-29 | 1997-10-01 | Samsung Heavy Ind | Structure for mounting rod stroke sensor on cylinder actuator |
US20050155705A1 (en) * | 2002-05-30 | 2005-07-21 | Holzer Mark R. | Induction seaming tapes, systems and methods |
US20060127249A1 (en) * | 2002-09-12 | 2006-06-15 | Lilie Dietmar E B | Fluid pump, a fluid-transfer plate and an inductive sensor for a fluid pump |
US20120210929A1 (en) * | 2010-09-15 | 2012-08-23 | Kiser Thomas S | Portable Literature Display |
US20120280579A1 (en) * | 2011-05-06 | 2012-11-08 | Bose Corporation | Linear moving magnet motor cogging force ripple reducing |
CN103752797A (en) * | 2013-12-25 | 2014-04-30 | 苏州三基铸造装备股份有限公司 | Direct reading type injection control system |
CN103983178A (en) * | 2014-05-22 | 2014-08-13 | 无锡威孚高科技集团股份有限公司 | Proximity type timing sensor using magnetism principle |
US20150176615A1 (en) * | 2009-02-05 | 2015-06-25 | Wabco Gmbh | Piston-cylinder assembly having integrated measuring device |
US20170037714A1 (en) * | 2015-08-05 | 2017-02-09 | Amfields, Lp | Hydraulic pumping system with piston displacement sensing and control |
WO2017155788A1 (en) * | 2016-03-08 | 2017-09-14 | Weatherford Technology Holdings, Llc | Position sensing for wellsite pumping unit |
US9909601B2 (en) | 2010-11-16 | 2018-03-06 | Illinois Tool Works Inc. | Motor control |
DE102004049109C5 (en) * | 2003-10-10 | 2018-12-13 | Gimatic S.P.A. | A cutter or gripper with means for detecting the completion of work |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5201838A (en) * | 1989-09-05 | 1993-04-13 | Philippe Roudaut | Position indicator for a piston controlled robot part |
FR2651543B1 (en) * | 1989-09-05 | 1991-12-06 | Roudaut Philippe | PISTON-CYLINDER ASSEMBLY PROVIDED WITH MEANS FOR DETERMINING AND VALIDATING THE PISTON POSITION. |
DE10251255B4 (en) * | 2002-11-04 | 2005-11-24 | Lucas Automotive Gmbh | Master cylinder arrangement for a motor vehicle brake system |
FR2851538B1 (en) * | 2003-02-21 | 2006-04-28 | Bosch Gmbh Robert | MASTER CYLINDER OF A MOTOR VEHICLE WITH A DETECTION DEVICE FOR ACTUATING A BRAKING SYSTEM |
ITMI20071006A1 (en) * | 2007-05-18 | 2008-11-19 | Sunbird Invest Ltd | DEVICE FOR COUNTING THE RACES OF A PISTON |
US8058867B2 (en) | 2008-08-18 | 2011-11-15 | Deere & Company | System for determining the position of a movable member |
JP6434774B2 (en) * | 2014-10-08 | 2018-12-05 | 株式会社ヴァレオジャパン | switch |
Citations (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1080372A (en) * | 1964-07-21 | 1967-08-23 | Zeiss Jena Veb Carl | Inductive test-data transmitter |
GB1148064A (en) * | 1965-08-12 | 1969-04-10 | English Electric Co Ltd | Inductive proximity transducers |
US3453937A (en) * | 1967-09-14 | 1969-07-08 | Lionel Pacific Inc | Hydraulic actuator with proximity sensor of locked condition |
DE2059592A1 (en) * | 1969-12-03 | 1971-06-09 | Islef & Hagen As | Working cylinder with position encoder |
SU641277A1 (en) * | 1976-04-27 | 1979-01-05 | Войсковая часть 27177 | Sensitive element of signal inductive pickup |
US4229696A (en) * | 1976-10-12 | 1980-10-21 | Gustafson Adolf G | Sensor for measuring magnetic field changes |
DE2947516B1 (en) * | 1979-11-24 | 1981-01-15 | Festo Maschf Stoll G | Piston for contactless scanning of the piston position |
GB2067847A (en) * | 1980-01-23 | 1981-07-30 | Bosch Gmbh Robert | Position sensor |
SE419787B (en) * | 1978-05-03 | 1981-08-24 | Hydro Pneumatic Ab | WORKING CYLINDER WITH PISTON UNIT AND MAGNETIC PORTABLE INDICATOR |
US4316145A (en) * | 1976-10-01 | 1982-02-16 | Electro-Mechanical Products | Fluid pressure actuator with proximity position sensor |
GB2106984A (en) * | 1981-09-24 | 1983-04-20 | Gewerk Eisenhuette Westfalia | Hydraulic ram with stroke indication |
US4401966A (en) * | 1980-06-18 | 1983-08-30 | Asahi Kasei Kogyo Kabushiki Kaisha | Magnetoelectric transducer and fabrication method therefor |
US4419646A (en) * | 1979-12-22 | 1983-12-06 | Eduard Hermle | Electric proximity sensor |
SE431782B (en) * | 1976-11-11 | 1984-02-27 | Festo Maschf Stoll G | PNEUMATIC OR HYDRAULIC PISTON AND CYLINDER DEVICE |
GB2129879A (en) * | 1982-11-09 | 1984-05-23 | Gewerk Eisenhuette Westfalia | Hydraulic ram with magnetic position sensing |
US4517514A (en) * | 1982-09-30 | 1985-05-14 | Design Professionals Financial Corporation | Vibration transducer with dual opposed magnetic assemblies and counterbalanced mass |
JPS61172079A (en) * | 1984-03-14 | 1986-08-02 | Matsushita Electric Works Ltd | Hall sensor |
US4617451A (en) * | 1983-08-03 | 1986-10-14 | Davidson & Company Limited | Inductance sensor |
US4618823A (en) * | 1982-09-30 | 1986-10-21 | Werner Turck Gmbh & Co. Kg | Inductive proximity switch having an oscillator magnetic core and a permanent magnet forming a saturation-sensitive magnetization area |
US4652820A (en) * | 1983-03-23 | 1987-03-24 | North American Philips Corporation | Combined position sensor and magnetic motor or bearing |
US4726282A (en) * | 1986-04-28 | 1988-02-23 | Peninsular, Inc. | Fixture cylinder with proximity switches mounted on end caps without spacers |
US4736674A (en) * | 1984-12-22 | 1988-04-12 | Kurt Stoll | Abutment arrangement and position detector for a piston and cylinder actuator |
EP1087041A1 (en) * | 1999-03-16 | 2001-03-28 | Shin-Etsu Handotai Co., Ltd | Production method for silicon wafer and silicon wafer |
-
1986
- 1986-04-29 DK DK195886A patent/DK195886A/en unknown
-
1987
- 1987-04-14 US US07/143,168 patent/US4846048A/en not_active Expired - Fee Related
- 1987-04-14 WO PCT/DK1987/000039 patent/WO1987006656A1/en not_active Application Discontinuation
- 1987-04-14 EP EP87903270A patent/EP0269662A1/en not_active Withdrawn
- 1987-04-14 JP JP62503020A patent/JPS63503159A/en active Pending
- 1987-12-28 FI FI875735A patent/FI875735A0/en not_active Application Discontinuation
Patent Citations (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1080372A (en) * | 1964-07-21 | 1967-08-23 | Zeiss Jena Veb Carl | Inductive test-data transmitter |
GB1148064A (en) * | 1965-08-12 | 1969-04-10 | English Electric Co Ltd | Inductive proximity transducers |
US3453937A (en) * | 1967-09-14 | 1969-07-08 | Lionel Pacific Inc | Hydraulic actuator with proximity sensor of locked condition |
DE2059592A1 (en) * | 1969-12-03 | 1971-06-09 | Islef & Hagen As | Working cylinder with position encoder |
SU641277A1 (en) * | 1976-04-27 | 1979-01-05 | Войсковая часть 27177 | Sensitive element of signal inductive pickup |
US4316145A (en) * | 1976-10-01 | 1982-02-16 | Electro-Mechanical Products | Fluid pressure actuator with proximity position sensor |
US4229696A (en) * | 1976-10-12 | 1980-10-21 | Gustafson Adolf G | Sensor for measuring magnetic field changes |
SE431782B (en) * | 1976-11-11 | 1984-02-27 | Festo Maschf Stoll G | PNEUMATIC OR HYDRAULIC PISTON AND CYLINDER DEVICE |
SE419787B (en) * | 1978-05-03 | 1981-08-24 | Hydro Pneumatic Ab | WORKING CYLINDER WITH PISTON UNIT AND MAGNETIC PORTABLE INDICATOR |
DE2947516B1 (en) * | 1979-11-24 | 1981-01-15 | Festo Maschf Stoll G | Piston for contactless scanning of the piston position |
US4419646A (en) * | 1979-12-22 | 1983-12-06 | Eduard Hermle | Electric proximity sensor |
GB2067847A (en) * | 1980-01-23 | 1981-07-30 | Bosch Gmbh Robert | Position sensor |
US4401966A (en) * | 1980-06-18 | 1983-08-30 | Asahi Kasei Kogyo Kabushiki Kaisha | Magnetoelectric transducer and fabrication method therefor |
GB2106984A (en) * | 1981-09-24 | 1983-04-20 | Gewerk Eisenhuette Westfalia | Hydraulic ram with stroke indication |
US4517514A (en) * | 1982-09-30 | 1985-05-14 | Design Professionals Financial Corporation | Vibration transducer with dual opposed magnetic assemblies and counterbalanced mass |
US4618823A (en) * | 1982-09-30 | 1986-10-21 | Werner Turck Gmbh & Co. Kg | Inductive proximity switch having an oscillator magnetic core and a permanent magnet forming a saturation-sensitive magnetization area |
GB2129879A (en) * | 1982-11-09 | 1984-05-23 | Gewerk Eisenhuette Westfalia | Hydraulic ram with magnetic position sensing |
US4652820A (en) * | 1983-03-23 | 1987-03-24 | North American Philips Corporation | Combined position sensor and magnetic motor or bearing |
US4617451A (en) * | 1983-08-03 | 1986-10-14 | Davidson & Company Limited | Inductance sensor |
JPS61172079A (en) * | 1984-03-14 | 1986-08-02 | Matsushita Electric Works Ltd | Hall sensor |
US4736674A (en) * | 1984-12-22 | 1988-04-12 | Kurt Stoll | Abutment arrangement and position detector for a piston and cylinder actuator |
US4726282A (en) * | 1986-04-28 | 1988-02-23 | Peninsular, Inc. | Fixture cylinder with proximity switches mounted on end caps without spacers |
EP1087041A1 (en) * | 1999-03-16 | 2001-03-28 | Shin-Etsu Handotai Co., Ltd | Production method for silicon wafer and silicon wafer |
Non-Patent Citations (1)
Title |
---|
Product Sheet, Micro Switch, Micro Switch Corp., Freeport, Ill. * |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5477675A (en) * | 1989-02-17 | 1995-12-26 | Nartron Corporation | Fluid power assist method and apparatus |
US5271121A (en) * | 1992-01-21 | 1993-12-21 | Maverick International, Inc. | Pneumatic windshield wiper with sensor controlled motor |
US5325762A (en) * | 1992-10-29 | 1994-07-05 | Nordson Corporation | Fluid pressure operated piston engine assembly |
GB2311612A (en) * | 1996-03-29 | 1997-10-01 | Samsung Heavy Ind | Structure for mounting rod stroke sensor on cylinder actuator |
GB2311612B (en) * | 1996-03-29 | 1999-12-15 | Samsung Heavy Ind | Structure for mounting rod stroke sensor on cylinder actuator |
US20050173418A1 (en) * | 2002-05-30 | 2005-08-11 | Holzer Mark R. | Induction seaming tapes, systems and methods |
US20050155705A1 (en) * | 2002-05-30 | 2005-07-21 | Holzer Mark R. | Induction seaming tapes, systems and methods |
US20060127249A1 (en) * | 2002-09-12 | 2006-06-15 | Lilie Dietmar E B | Fluid pump, a fluid-transfer plate and an inductive sensor for a fluid pump |
US7744354B2 (en) * | 2002-09-12 | 2010-06-29 | Empresa Brasileira de Compressores S.A. —EMBRACO | Fluid pump, a fluid-transfer plate and an inductive sensor for a fluid pump |
DE102004049109C5 (en) * | 2003-10-10 | 2018-12-13 | Gimatic S.P.A. | A cutter or gripper with means for detecting the completion of work |
US9771958B2 (en) * | 2009-02-05 | 2017-09-26 | Wabco Gmbh | Piston cylinder assembly having integrated measuring device |
US20150176615A1 (en) * | 2009-02-05 | 2015-06-25 | Wabco Gmbh | Piston-cylinder assembly having integrated measuring device |
US20120210929A1 (en) * | 2010-09-15 | 2012-08-23 | Kiser Thomas S | Portable Literature Display |
US8510976B2 (en) * | 2010-09-15 | 2013-08-20 | Thomas S. Kiser | Portable literature display |
US9909601B2 (en) | 2010-11-16 | 2018-03-06 | Illinois Tool Works Inc. | Motor control |
US20120280579A1 (en) * | 2011-05-06 | 2012-11-08 | Bose Corporation | Linear moving magnet motor cogging force ripple reducing |
CN103752797A (en) * | 2013-12-25 | 2014-04-30 | 苏州三基铸造装备股份有限公司 | Direct reading type injection control system |
CN103983178A (en) * | 2014-05-22 | 2014-08-13 | 无锡威孚高科技集团股份有限公司 | Proximity type timing sensor using magnetism principle |
US20170037714A1 (en) * | 2015-08-05 | 2017-02-09 | Amfields, Lp | Hydraulic pumping system with piston displacement sensing and control |
US11098708B2 (en) | 2015-08-05 | 2021-08-24 | Weatherford Technology Holdings, Llc | Hydraulic pumping system with piston displacement sensing and control |
WO2017155788A1 (en) * | 2016-03-08 | 2017-09-14 | Weatherford Technology Holdings, Llc | Position sensing for wellsite pumping unit |
US10344573B2 (en) | 2016-03-08 | 2019-07-09 | Weatherford Technology Holdings, Llc | Position sensing for wellsite pumping unit |
Also Published As
Publication number | Publication date |
---|---|
EP0269662A1 (en) | 1988-06-08 |
DK195886D0 (en) | 1986-04-29 |
FI875735A (en) | 1987-12-28 |
FI875735A0 (en) | 1987-12-28 |
DK195886A (en) | 1987-10-30 |
JPS63503159A (en) | 1988-11-17 |
WO1987006656A1 (en) | 1987-11-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HVILSTED, NIELS, 4, SANDLODSVEJ, DK-3250 GILLEJE, Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CHRISTENSEN, FINN D.;REEL/FRAME:004876/0290 Effective date: 19871111 Owner name: PEDERSEN, KAJ, 42, KILDEHUSVEJ, DK-4000 ROSKILDE, Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CHRISTENSEN, FINN D.;REEL/FRAME:004876/0290 Effective date: 19871111 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 19930711 |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |